SU988780A2 - Gas and liquid solvent - Google Patents

Description

The invention relates to a catalytic treatment plant and can be used for biological wastewater treatment.

According to the main auth. 551357 a gas-liquid-solvent for starch water treatment is known, containing at least one liquid treatment chamber connected to liquid and gas supply systems. The solvent is also provided with one, or several, by the number of primary / secondary chambers, each of which is installed in front of the main, HIGH 9, and connected to an evacuating system, with the main and additional chambers connected in series with each other tl.

However, the well-known device, along with a reduction in energy consumption for air compression and an increase in the speed of wastewater treatment, does not sufficiently {ohm degree solves the problem of cleaning the cleaning process in each section and simplifying the procedure for removing precipitated surplus accumulation.

The purpose of the invention is to increase the efficiency of use by optimizing the wastewater treatment process. ,

To achieve this goal, each of the additional chambers of the solvent is provided in the upper part with a tap with a shut-off and control device and an assembly line with a tee connected to the waste liquid supply pipeline; in a solvent and with a pipeline for supplying excess activated sludge.

In FIG. Figure 1 shows a diagram of a gas-liquid solvent for the purification of waste water, which ensures the realization of the mass-transfer process in the regime of periodic disruption of the gas-liquid equilibrium state, in axonometryJ in fig. 2 - additional camera.

20

The gas-liquid solvent contains the main chambers 1 for the treatment of liquids, connected by pipelines 2 and 3 with the systems for supplying liquid and gas, respectively

25 chambers 4, connected by pipeline 5 with a vacuum system with system 6 and pipelines 7 - with chambers 1, the last of which is equipped with an outlet pipe 8, and pipelines 5

30 are equipped with control valves 9.

Each additional chamber is provided with an outlet 10 with a shut-off and control device 11 connected to the collecting line 12 with a tee, one tee branch 13 being inserted into the pipeline 2ILI 7 for supplying the waste liquid to the first main solvent chamber along the flow of the liquid and the second tee branch 14 ; - connected with pipeline 15 for supplying excess active sludge to facilities 16 for processing it, with locking and regulating devices 17 and 18 installed on the branches of the tee, and in the last additional chamber 4 along the flow of the liquid, a tray 19 is installed complete selection of concentrated active sludge from it. Tray 19 may be installed in other additional chambers to remove more concentrated excess sludge. Tray 19 can be pivoted for more efficient operation when solvent modes change.

Gas-liquid solvent. works as follows.

The clarified, waste water enters the first additional chamber 4, where, due to a decrease in pressure and a violation of the gas-liquid equilibrium state for this reason, gas is released from the wastewater in an amount proportional to the pressure differential across the ends of vertical pipes 7 of the overflow. The deaeration process proceeds rapidly, therefore the installation of 4 intensifiers in the chambers 4 is not required. From the first additional chamber 4, deaerated wastewater mixed with activated sludge, dosed by the locking device 17, flows into the first pressure main chamber 1, where, due to an increase in pressure. Therefore, the previously deaerated waste water continuously absorbs the compressed air pumped by the compressor in an amount proportional to the pressure differential at the ends of the vertical pipe 7 and the maximum solubility of air of 22 l / m waste water for each excess atmosphere of pressure difference between the main 1 and an additional 4 cameras. Moreover, the concentration of dissolved oxygen in the waste liquid will tend to an increase of 9.8 mg / l for each excess-atmosphere of pressure differential between these chambers, as a result of which the driving force of the dissolution of the pelvis in the liquid is an order of magnitude higher than in conventional pressure-free aerotank

With the advancement of the treated fluid to the end of the first main chamber 1, the concentration dissolved in it

oxygen is reduced, and the amount of dissolved associated gas — the product of biochemical processes in wastewater — which prevents the further intensive supply of atmospheric oxygen to the reaction site. and increases the inhibitory effect on aerobic bacteria of activated sludge. The volume of activated sludge is also increasing beyond its optimal amount. Therefore, in order to preserve the intensity of the oxidation process and to maintain the maximum intensity of the aerobic bacteria of the activated sludge, the partially purified water is directed to the next o. gas liquid solvent section. In the second additional chamber 4, due to the decrease in pressure, the gas-liquid equilibrium state is again disrupted and gas is rapidly released from the waste liquid, carrying activated sludge to the surface of the waste water in this chamber. That part of it, which is necessary to maintain an optimal mode of biological treatment, remains in the wastewater, and the excess part is diverted through the regulating device 11 to the branch 14 of the excess activated sludge. The metered optimal mixture of treated wastewater and activated sludge is then fed to the second main chamber 1, where the cleaning process continues.

In the last additional chamber 4, in the course of the flow of the liquid, the completely purified waste water enters, therefore all activated sludge is taken from it. To do this, a tray 19 is installed in the last chamber, which takes out a whole layer of deaerated gas bubbles with a thin layer from the surface of the treated wastewater.

Thus, the latter, along the course of the flow of the liquid, the additional chamber 4 functions as a secondary settling tank and allows eliminating the latter, and the first - reducing the capacity of the primary settling tank J,

All other additional chambers 4, due to the presence of excess activated sludge with a regulating device, simultaneously perform the function of dispensers, ensuring the optimal dose of activated sludge in the waste water first comes into the next cleaning chamber 1. The device can work both in the presence of a vacuum system and when it is removed. From the assembly line 12, the circulating part of the activated sludge is diverted to the solvent through the metering device 17, and the excess part of the activated sludge is diverted to the structure 16 for processing. The movement of sludge in the assembly line 12 is carried out by gravity due to airlift

Claims (1)

~ Claims Gas-liquid solvent according to ed. "551257, characterized in that, in order to increase the efficiency of its use by optimizing the cleaning process, it is equipped with a collection pipe installed in its upper part with 'shut-off and control valves, connected with each additional chamber, the feed pipe liquids, as well as a pipeline for supplying excess activated sludge.